Rotatable grate.



No. 851,043- PATENTED APR. 23, 1907.

' O. TROSSIN.

ROTATABLE GRATE.

APBLIOATIOR FILED FEB 2. 1907.

l I I y r I i 5 W a a 1 mmms PET c i o'rro rnossnv, OF HAMBURG, GERMANY,

UNITED STATES PATENT @FFTCE.

i V WHHASEIGNOR TO ERNEST MATTHIAS ADALBERT FEUERHEERD, OF HAMBURG, GERMANY.

ROTATABLE GRATE.

Application filed February 2, 1907. Serial No. 355,443.

l atented April 23, 1907'.

T0 at 1071,0722, it 'III/(I/Z/ colwern: 5 further into the fireplace B, and thus the Be it known that I, OTTO TROSSIN, a sub- 1 workingpart of the grating proper islnade ject of the German Emperor, and a resident smaller-that is, there is a smaller number of Hamburg, in the German Empire, have of fire-bars b lying in the space B. When invented a certain new and useful Improvei the working grating is largest-that is, when ment in Rotatable Grates, of which the foll the plate does not project into the space B at lowing is a specification. all-the feed of the air to the surface can be The present invention refers to a rotatable i regulated alone by turning the grate A. grate which is especially designed to be used Evidently the grate may be used also for in furnaces for coal-dust and which can refurnaces for other coal than for coal-dust. volve about a horizontal axis. I clain1 The object is to make the working grating- I 1. A grate comprising a plurality of firesurface properly adjustable as to its size and plates mounted to move in a circle and havalso to enable a regulation of the draft of air. ing supportingfaces at an angle to the radii To this end the grate, which is made cylinof the circle and a curved plate movable with. drical, has one portion which has no open- I the bars concentric to the center of the ings, but is formed of a suitably-bent plate, 1 circle. which by rotating the grate can be moved 1 2.'A- grate comprising supporting-disks, a away from the fireplace or more or less into i plurality of flat lire-bars mounted therein this place to replace In the drawings, Figure 1 shows a boiler furnace in sectional elevation; and Fig. 2 l concentric to the axis thereof. shows the same in cross-section," the rotata- 5 3. A grate comprising a rotatable shaft, ble grating being shown to one-half in longiparallel disks mountedthereon, a plurality tudinal section and to one.half in elevation. of flat fire-bars mounted in the disks having The cylindrical grate A consists of two cirl their faces at an angle to the radii of the cular plates a, mounted on ahorizontal shaft I disks, and. a curved plate secured to the (Z, of a number of fire bars b, and of a bent i disks concentric to the axis thereof. plate 0, both fixed to the plates (1' by any l 4. In afurnace, the combination of aplate suitable means. Preferably the number of extending from. the base of the door thereof the disks, and a plate mounted in the disks fire-bars encompass an angle of two hundred into the fire-box, a rotatable shaft mounted and forty degrees, in the latter, parallel disks mounted on the the remaining one shaft, a curved plate mounted on the disks grees. adapted to intersect the plane of the afore- The grate A contacts with the lower plate said plate, and a plurality of flat bars mountf of the door-frame in such manner that the ed in the disks having their faces at an angle vertical central plane of the grate is not far to the radii thereof. behind the back edge of this plate f. The l shaft d is journaled in the walls of the furnace and may project out for a short distance to enable it to be turned. When it is I turned to the left, the plate a is brought 1 so that the plate a fills up hundred and twenty deoTro TROSSIN.

Witnesses:

MAX F. A. KAEMPEF, Orro W. HELLMRIcH. 

